♻️ Remove Ember test app ESLint

The Ember fixture does not need a separate ESLint dependency stream now that the repo uses Biome for package code and keeps this app validated through template lint, CSS lint, formatting, builds, and SDK tests.

Author: Robdel12

clients/ember/test-app/eslint.config.mjs

@@ -20,8 +20,6 @@
     "lint:format": "prettier . --cache --check",
     "lint:hbs": "ember-template-lint .",
     "lint:hbs:fix": "ember-template-lint . --fix",
-    "lint:js": "eslint . --cache",
-    "lint:js:fix": "eslint . --fix",
     "start": "vite",
     "test": "vite build --mode development && ember test --path dist"
   },
@@ -31,7 +29,6 @@
   },
   "devDependencies": {
     "@babel/core": "^7.29.7",
-    "@babel/eslint-parser": "^7.29.7",
     "@babel/plugin-transform-runtime": "^7.29.7",
     "@babel/runtime": "^7.29.7",
     "@ember/optional-features": "^3.0.0",
@@ -45,7 +42,6 @@
     "@embroider/macros": "^1.20.3",
     "@embroider/router": "^3.0.6",
     "@embroider/vite": "^1.7.4",
-    "@eslint/js": "^9.39.4",
     "@glimmer/component": "^2.1.1",
     "@rollup/plugin-babel": "^7.0.0",
     "@warp-drive/ember": "~5.8.2",
@@ -64,12 +60,6 @@
     "ember-resolver": "^13.2.0",
     "ember-source": "~7.0.0",
     "ember-template-lint": "^7.9.3",
-    "eslint": "^9.39.4",
-    "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-ember": "^13.3.0",
-    "eslint-plugin-n": "^18.0.1",
-    "eslint-plugin-qunit": "^8.2.6",
-    "globals": "^17.6.0",
     "prettier": "^3.8.3",
     "prettier-plugin-ember-template-tag": "^2.1.6",
     "qunit": "^2.25.0",